3x²-[5x-(1/2x-3)+2x²]怎样去括号?
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/08/15 21:03:25
3x²-[5x-(1/2x-3)+2x²]怎样去括号?
![3x²-[5x-(1/2x-3)+2x²]怎样去括号?](/uploads/image/z/215441-17-1.jpg?t=3x%26sup2%3B-%5B5x-%281%2F2x-3%29%2B2x%26sup2%3B%5D%E6%80%8E%E6%A0%B7%E5%8E%BB%E6%8B%AC%E5%8F%B7%3F)
3x²-[5x-(1/2x-3)+2x²]
=3x²-(5x-1/2x+3+2x²)
=3x²-5x+1/2x-3-2x²
=x²-9/2x-3
=3x²-(5x-1/2x+3+2x²)
=3x²-5x+1/2x-3-2x²
=x²-9/2x-3
3x²-[5x-(1/2x-3)+2x²]怎样去括号?
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